Improved machine for grinding oil-paints



UNITED STATES PATENT EEicE,

HENRY W. GEAR, OF NEW YORK, N. Y.

IMPROVED MACHINE FOR. GRINDING OIL-PAINTS.

Specification forming part of Letters Patent No. 12.364, dated April 19, 1864- To all whom it may concern:

Be it known that I, HENRY W. GEAR, of the city, county, and State of .N ew York, have invented a new and Improved Machine for Grinding Oil-Paints; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a vertical section of my invention, the plane of section beingindicated by the line w x, Fig. 2.v Fig. 2 is ahorizontal lsection of the saine, taken in the plane y y, Fig. l.

Similar letters of reference indicate corresponding parts in both views.

This invention consists in the employment or use of one or more mullers, adjustable on arms extending in a horizontal direction from a vertical shaft, in combination with sli pweights, and with a stationary bed or platform in such a manner that by means of the slip-weights the muller or mullers can be depressed upon the bed with more or less force, as occasion may require, and by imparting to said shaft a rotary motion the muller or mullers are carried over the bed, and the operation of grinding paints can be effected by steam or any other suitable power, in contradistinction to the ordinary method of eft'ectin g the operation entirely by hand-labor.

To enable those skilled in the art to make and use my invention, I will proceed t0 describe it.

A represents a frame or table, which sup ports the bed B. This bed is made of glass, marble, or other suitable material, and it is situated under the vertical arbor C, which has its bearings in two arms, a, extending from an upright, D. This upright rises on the side of the table A, and the arms a extend far enough out to bring the arbor C right over the center of the bed B.

E is the driving-shaft, which has its bear ings in the upright D, and in a vertical bar, b, connecting the two horizontal arms a, and to which a rotary motion is imparted by means of a crank, F, or by pulleys mounted thereon, and connecting by belts, or in any other suitable manner, with a steam-engine or other suitable source of power. The mo-v tion 'of the shaft E is transmitted to the vertical arbor G by means of bevel-gear o d, mounted on said shaft and arbor, in the manner as clearly shown in Fig. l of the drawings.

From the lower end of the arbor (l extend one or more arms, G, in a horizontal direction, to such a distance that the same in rotating with the vertical arbor will clear the upright D, and these arms carry the mullers H. These mullers are made of stone, glass, or other suitable material, somewhat in the form and shape of the mullers generally used in grinding artists7 paints byl hand, and they are provided with stems or shanks e, the lower ends of which are perforated with holes f, which t quite loosely on the horizontal arms G, and they are confined on said arms by means of sleeves j", which are secured in the desired position by set-screws g. The upper parts ot' the shanks e of the mullers form sockets for the slip-weights h, which serve to press the mullers down upon the bed with the desired force, it being obvious that by increasing the number of weights the force with which the mullers are depressed is also increased, and vice versa.

The operation is as follows: The paint to be ground ismixed to the desired consistency with oil and spread on the bed B, and the mullers are loaded with the requisite weight, and adjusted on the arms G at such distance from the center of the bed that one of the mullers passes over the inner and the other over the outer portion ofthe same, as clearly shown in the drawings, and by imparting a rotary motion to the arbor C the operation of grinding is effected. The nature ot' the muller is similar to that of the usual mullers used in grinding by hand, and the iineness of the paints naturally depends upon the length of time during which they are exposed to the action of the mullers, and to the force with which said mullers are depressed upon the bed.

By means of this machine the tedious work of grinding paints by hand can be dispensed with, and the paints are ground better and at much less expense than by the usualhandlabor. i

Having thus described my invention, what and operated in the manner and for the pur- I claim as new, and desire to secure by Letters pose substantially as herein shown and de- Patent, isl scribed.

The employment or use of one or more mullers, H, adjustable on arms G, which extend HLBRY W' GEAR' in a horizontal direction from the vertical ar- Witnesses: bor C, in combination with slip-Weights h and M. M. LIVINGSTON, with the stationary bed B, all constructed GEO. W. REED. 

